摘要
利用贵州省威宁站探空和地面露点观测资料,分别计算了不同季节大气总可降水量(PWV),对其研究表明:两种资料计算的PWV精度差异较小,均为毫米级,平均差值绝对值小于2.2 mm,其中最大差值出现在夏季2.38 mm,最小值出现在春季1.6 mm。探空资料计算大气可降水量与地面资料计算大气可降水量两者在不同季节,相关性都较高。春、秋两个季相关性最好,相关系数分别为0.903、0.851;夏季和冬季相关系数均为0.754。因此,在大气水汽监测、降水预报应用过程中,利用地面露点温度(t d)获取的大气总可降水量(DM/PWV)可以弥补探空资料观测时空分辨率的不足。研究结果也表明降雨天气过程与PWV间有良好的对应关系,降水强度与大气可降水量之间不成比例关系。
The total Precipitable Water Vapor(PWV)in different seasons was calculated based on the observation data of sounding and surface dew point of Weining Station in Guizhou Province.The study shows that:the accuracy of PWV calculated by the two kinds of data has a small difference,both are at the level of mm,and the average absolute value of difference is less than 2.2 mm.The maximum difference occurs in 2.38 mm in summer,and the minimum difference occurs in 1.6 mm in spring.Caculations for atmospheric precipitation with the two type data shows a relatively high correlation between the radiosonde data and sounding data in different seasons.The correlations in spring and autumn are the best,with correlation coefficients reaching 0.903 and 0.851,respectively;while summer and winter correlation coefficients are 0.754.Therefore,in the application process of atmospheric water vapor monitoring and precipitation forecast,the total precipitation(DM/PWV)of the atmosphere obtained by using the ground dew point temperature(td)can make up for the lack of space-time resolution of sounding data observation.The research results also show that there is a good correspondence between the rainfall weather process and PWV.Meanwhile,as a contrast,there is a disproportionate relationship between precipitation intensity and atmospheric precipitation.
作者
柯莉萍
张艳
陈银东
杨洋
阎廷
KE Liping;ZHANG Yan;CHEN Yindong;YANG Yang;YAN Ting(Weining County Meteorological Bureau of Guizhou Province,Weining 553100,China;Zhijin Meteorological Bureau of Guizhou Province,Zhijin 552100,China)
出处
《中低纬山地气象》
2020年第5期26-31,共6页
Mid-low Latitude Mountain Meteorology
基金
贵州省气象局登记式项目(黔气科登[2019]06-02号):贵州省GPS水汽反演中的加权平均温度的时空分布特征及建模。
关键词
大气可降水量
探空资料
地面露点
降雨量
atmospheric precipitable water
sounding data
surface dew point
rainfall
